Alexander randol



(No Model.)

A. RAN D0L. UNDERGROUND GAS MAIN.

Patented Apinflvfl.` f

UNITED STATES PATENT OFFICE.

ALEXANDER BANDOL, OF TABENTUM, ASSIGNOB OF TWO-THIRDS TO JOHN, i M.ARNOLD, OF PITTSBURG, AND GEORGE S. MOKEE, OF ALLEGHENY CITY,PENSYLVANIA.

UNDERGROUND GAS-MAIN.

SPECIFICATION forming part of Letters Patent No. 315,443, dated April 7,1885. i

Application filed February 5, 18.25. (No model.)

.T all whom, it may concern.-

Be it known that 1,"ALExANDER BANDOL, of Tarentum, Pennsylvania, haveinvented a new and useful Improvement in Underground Gas-Mains, whichimprovement is fully set forth in the following specification, referencebeing had to the accompanying drawings.

Similar letters of reference indicate corresponding parts. t

My invention relates to pipes used in conveying natural gas from thewells to and through cities and towns where it is to be consumed.Experience has demonstrated that this gas when under a high pressureoozes out through the pipes at hundreds of pores, and much more sothrough defects in the pipe and also at the joints. To'such an extent isthis done that it seems quite impossible to confine it. When this gasdoes thus liberate itself 2o from the gas-mains, it is found byexperience to go off into the adjacent soil, and frequently makes itsway into cellars of housesor into the sewers, and in this way becomes ahighlydangerous substance, frequently terminating 2 5 in greatexplosions. The great utility of natural gas makes it highly necessarythat it be rendered and made as Vrharmless as possible, and to this endis my invention.

In the accompanying drawings, Figure 1 is 3o a longitudinal section of agas-main as seen in position underground, and Fig. 2 is a perspectiveview of the gasmain laid in a boxing. A represents the gas pipe or main.B is the pipe leading from the gas-well. b is a pipe conveying the gasfrom'pipe B to the gas-main A. Gis an air-blower. c istheairpipe,conveying the air from the blower into the safety-chamber D.a is an escape-pipe. The chamber D is made somewhat larger than 4o thegas-main A, and is made of wood, earthen tile, or metallic. Thischamber, it will be seen, is intended to admit of air being blown intoit from the blower C. When this is done,

the pressure of the air will take up the gas i high brick stacks (orother kinds of stacks,`

such as are usually found in iron mills and furnaces) for the samepurpose of conveying harmlessly away all the liberated gas getting finto the chamber D.

In addition to the blower C forcing the `gas j I through the chamber Dto the exits, a suction can be made. by setting fire to the said stacks,

which, when once a considerable `dame is secured, will tend to draw theair and gas up the same to the top. I expect iby this means to perfectlycontrol, manage, and carry the terror to the people living "along theline of gaspipes leading from natural-gas wells.

This suction mayalso be partly secured by c m-eans of the pipes a, asthey, too, may be fired,

at the top, first being erected so high above buildings as to beharmless.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, is-

in combination with the gaspipe A, the airpipe B, inclosing the same andleaving an "`air` space between them, the outlet-pipe a, communicatingwith said air-pipe, the inlet-pipe c,

also communicating with said air-pipe, and the blower O, whereby air isforced through inletpipe c into air-pipe D, in order that it may carryoff through outletpipe a all gas escap-1 ing from pipe A, substantiallyas set forth.

In testimony that I claim the foregoing as my invention I hereto set myhand in'presence of two witnesses.

Witnesses:

I. H. LrvrNesToN, JOHN H. GEATTY.

ALEx. BANDOL. t

6o oil" that portion of natural gas which is now

